Season 4, Episode 14 The Blue Butterfly
First Aired: February 6, 2012
Castle and Beckett revisit a private eye's 1947 homicide after realizing it's connected to a present-day murder they're investigating.
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- Premiered: March 9, 2009
- Rating: TV-PG
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- Premise: Successful mystery novelist Richard Castle starts working with the New York Police Department (NYPD) homicide investigation team after a serial killer decides to use plots from his novels for no good. (more)